用维度分析对紫外线光反应器进行剂量分配缩放和验证
Nikhil Sangwan1, Yousra M Ahmed2, Ernest R Blatchley3,4
1Prairie Research Institute, University of Illinois at Urbana-Champaign, 2204 Griffith Drive, Champaign, Illinois 61820, United States.
Environmental science & technology
|October 17, 2023
概括
使用维度分析的新缩放方法可以预测紫外线消毒性能. 这种方法准确地估计了紫外线剂量分布,为传统水处理方法提供了具有成本效益的替代方案.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 消毒科学 消毒科学
背景情况:
- 紫外线 (UV) 消毒对于饮用水和废水处理至关重要.
- 目前的紫外线消毒系统设计依赖于经验方法,这些方法昂贵,对光反应器的行为提供有限的洞察力.
- 系统性能取决于紫外线剂量分布,这是反应器的一个关键特征.
研究的目的:
- 为紫外线消毒系统开发一种新的剂量分配缩放方法.
- 为了能够准确地预测UV光反应器在各种操作条件下的性能.
- 为传统的设计和验证方法提供一个具有成本效益和快速的替代方案.
主要方法:
- 用维度分析,特别是白金汉-π定理,来开发缩放方法.
- 定义了三个无维度组:紫外线剂量,反应堆几何和紫外线吸收.
- 该方法在15个操作条件,不同流速,紫外线透射率和灯功率方面得到了验证.
主要成果:
- 开发的缩放方法准确地预测了不同操作条件下的紫外线剂量分布.
- 对MS2和大肠杆菌的消毒功效的预测与传统基于计算流体动力学的建模非常一致.
- 该方法成功地缩小了用无维变量表示流量,紫外线透射率和灯功率的剂量分配.
结论:
- 拟议的剂量分配缩放方法为预测紫外线消毒系统性能提供了一种低成本,快速的方法.
- 这种方法适用于广泛的操作条件和微生物剂.
- 这些发现为优化紫外线消毒系统设计和运行提供了宝贵的工具.
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